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NJU7357RB1-TE2 [NJRC]

Micro Peripheral IC,;
NJU7357RB1-TE2
型号： NJU7357RB1-TE2
厂家： NEW JAPAN RADIO    NEW JAPAN RADIO
描述：

Micro Peripheral IC,
文件： 总8页 (文件大小：65K)
中文：  中文翻译
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NJU7357  
Single-phase DC Brushless Motor Driver IC  
■GENERAL DESCRIPTION  
■PACKAGE OUTLINE  
The NJU7357 is single-phase DC brushless motor driver IC.  
And It features MOS-FET driver circuit for better output  
characteristics.  
NJU7357 features Lock Detect (Ct less type), Frequency  
Generator Output, Thermal Shutdown Circuit and PWM_IN  
INPUT for Rotation Speed Control.  
Maximum output current is 1000mA and Continuance output  
current is 400mA.  
NJU7357RB1  
It is suitable for variable speed FAN required Low Noise &  
Good Efficiency characteristics.  
■FEATURES  
• Operating Voltage  
• Low Operating Current  
2.2 to 5.5V  
IDD=2mA  
• Low Saturation Output Voltage  
Vsat= ±0.2V @Io=±400mA  
• Lock Detect / Auto Release Circuit (Condenser less type)  
• Thermal Shutdown Circuit  
• Frequency Generator Output  
• CMOS Technology  
• Package Outline  
TVSP8  
■BLOCK DIAGLAM  
■PIN FUNCTION  
1: OUTB  
2: VDD  
3: IN +  
4: IN -  
5: FG  
6: PWM_IN  
7: OUTA  
8: VSS  
1
2
8
7
6
5
LD  
TSD  
Control  
3
4
- 1 -  
Ver.1.0  
NJU7357  
■ABSOLUTE MAXIMUM RATINGS  
(Ta=25°C)  
NOTE  
PARAMETER  
RATINGS  
SYMBOL (unit)  
Supply Voltage  
Input Voltage  
+7.0  
-0.3 VDD  
1000  
VDD (V)  
VID(V)  
(
*
1)  
Output Current (Peak)  
Operating Temperature Range  
Storage Temperature Range  
Power Dissipation  
IO PEAK (mA)  
Topr (°C)  
Tstg (°C)  
PD (mW)  
Tjmax(°C)  
(*  
2)  
-40 +85  
-50 +150  
400  
Device itself  
Junction Temperature  
150  
(*1). Input voltage is not to be over supply voltage to really use.  
(*2). This value is not to be over Pd.  
■RECOMMENDED OPERATING CONDITIONS  
(Ta=25°C)  
UNIT  
V
PARAMETER  
Supply Voltage  
SYMBOL  
VDD  
CONDITION  
-
MIN.  
2.2  
TYP.  
5.0  
MAX.  
5.5  
- 2 -  
NJU7357  
■ELECTRICAL CHARACTERISTICS  
(VDD =5V, Ta=25°C)  
PARAMETER  
General  
SYMBOL  
CONDITION  
MIN.  
TYP.  
MAX.  
UNIT  
Operating Current  
IDD  
-
-
-
-
2.0  
5.0  
-
mA  
Thermal Shutdown  
Temperature  
TTSD  
180  
°C  
Thermal Shutdown  
Hysteresis  
THYS  
-
-
50  
-
°C  
Hall Amplifier  
Input Offset Voltage  
Feedback Resistance  
Open Loop Gain  
VIO  
RF  
AV  
-
-
-
-10  
-
10  
-
mV  
kΩ  
dB  
-
-
27.5  
70  
-
Input Common Mode  
Voltage Range  
VICM  
-
0.4  
-
4.0  
V
Output  
Maximum Output  
Voltage Range  
VOH  
VOL  
Io=+400mA  
Io= -400mA  
4.65  
4.80  
0.20  
0.5  
0.5  
-
-
0.35  
-
V
-
-
-
-
-
RONH  
RONL  
VFG  
Io=+400mA  
Output Resistance  
Ω
Io=-400mA  
-
FG L Output Voltage  
FG H Leak Current  
0.3  
1.0  
V
IN+=5V, IN-=0V, RL=10kΩ  
IN+=0V, IN-=5V, RL=10kΩ  
IFG-LEAK  
-
µA  
Lock Detect Circuit*  
Lock Protect  
TON  
TOFF  
-
-
-
-
-
-
0.4  
2.8  
1:7  
-
-
-
sec  
sec  
-
ON Time  
Lock Protect  
OFF Time  
Detect Protection  
ON/OFF Ratio  
TVRATIO  
PWM Input  
PWM Input  
FPWM  
RPWM  
-
-
16  
-
-
50  
-
kHz  
Frequency Ratio  
PWM pull-up  
Resistance  
50  
kΩ  
Input H Level Voltage  
Input L Level Voltage  
VIHP  
VILP  
-
-
0.7VDD  
-
-
-
VDD  
V
V
0.3VDD  
- 3 -  
NJU7357  
■INPUT-OUTPUT TRUTH TABLE  
IN+  
IN -  
PWM  
OUTA  
OUTB  
FG  
H
L
H
L
L
H
L
H
H
L
H
L
L
L
L
H
L
L (Output Transistor ON )  
Z (Output Transistor OFF )  
L (Output Transistor ON )  
Z (Output Transistor OFF )  
H
L
L
■PWM TIMING CHART  
IN+  
IN-  
PW M_IN  
OUTA  
OUTB  
FG  
■FG TIMING CHART  
Motor locked  
Lock release  
IN+  
IN-  
PW M_IN  
OUTA  
OUTB  
FG  
Toff  
Ton  
Toff  
Motor lock protection period  
- 4 -  
NJU7357  
■POWER DISSIPATION  
400  
350  
300  
250  
200  
150  
100  
50  
0
125  
150  
25  
50  
75  
85  
100  
AMBIENT  
TEMPERATURE  
■TYPICAL CHARACTERISTICS  
VDD-IDD  
IFG-VFG  
IN+=VDD, IN-=GND  
MEAS:IDD  
VDD=5V, IN+=2.5V, IN-=GND  
MEA S:FG  
3
2
2
1
1
0
2000  
1800  
1600  
1400  
1200  
1000  
800  
600  
400  
200  
0
0
5
10  
15  
20  
0
2
4
6
8
IFG (mA)  
VDD (V)  
- 5 -  
NJU7357  
■TYPICAL CHARACTERISTICS  
VDD-VOH  
VDD-VOL  
VDD=5V, IN+=2.5V, IN-=GND  
MEAS:OUTA (Io=400mA)  
VDD=5V, IN-=2.5V, IN+=GND  
MEAS:OUTA (Io=400mA)  
500  
450  
400  
350  
300  
250  
200  
150  
100  
50  
300  
250  
200  
150  
100  
50  
0
0
0
2
4
6
8
0
2
4
6
8
VDD (V)  
VDD (V)  
Io-VOH  
Io-VOL  
VDD=5V, IN+=2.5V, IN-=GND  
MEAS:OUTA  
VDD=5V, IN-=2.5V, IN+=GND  
MEA S:OUTA  
1000  
900  
800  
700  
600  
500  
400  
300  
200  
100  
0
500  
450  
400  
350  
300  
250  
200  
150  
100  
50  
0
0
500  
1000  
1500  
2000  
0
500  
1000  
1500  
2000  
Io (mA)  
Io (mA)  
VDD-LOCKon_time  
IN+=Vdd/2, IN-=GND  
MEAS:OUTA  
VDD-LOCKof f _time  
IN+=Vdd/2, IN-=GND  
MEAS:OUTA  
0.5  
0.4  
0.3  
0.2  
0.1  
0.0  
3.5  
3.0  
2.5  
2.0  
1.5  
1.0  
0.5  
0.0  
0
2
4
6
8
0
1
2
3
4
5
6
7
8
VDD(V)  
VDD (V)  
- 6 -  
NJU7357  
■APPLICATION NOTE  
The NJU7357 are single-phase DC brushless motor driver IC in small TVSP8 package.  
With minimal external components, that can drive up to 500mA of motor current for small fan application.  
[Application Circuit Example]  
V+  
D1  
C1  
GND  
RL  
R1  
VDD  
Hall  
element  
OUTA  
IN+  
IN-  
Motor  
R2  
PWM_IN  
PWM_IN  
OUTB  
FG  
NJU7357  
FG  
[Design Notes]  
Above application example is designed for 5V operation with motor current of 500mA. It uses the following  
components:  
Hall elements: HW101A (AKE)  
1. Selection of C1 and D1:  
C1 is used for a noise reduction purpose. A typical value is 0.1uF.  
Optimize the value in actual operating conditions if necessary. D1 is a diode for protection against reverse voltage  
supply. Silicon rectifier diode (WO3C, 10D1 and equivalent) is appropriate.  
2. Design of hall element bias resistance (R1 and R2)  
Hall amplifier is a differential amplifier.  
The common-mode input voltage is between 0.4V and VDD-1V and the input signal must be within the range.  
Non-excitation hall bias voltage is to be set at a half of VDD for effective use of common-mode input voltage range.  
Therefore the same value of hall bias resistors is selected for R1 and R2.  
Given that the bias current is set to be 5mA by HW101A datasheet, R1 and R2 can be determined as follows:  
VDD  
5
R1+ R2 + Rin =  
R1 = R2 = 300Ω  
=
=1.0kΩ  
Ihbias 5×10−3  
- 7 -  
NJU7357  
The output voltage of hall elements is influenced by the bias current and magnetic flux density of hall elements.  
The optimum input voltage of NJU7357 are 100mVp-p and higher. With such input voltage, the highest efficiency can  
be obtained.  
4. Design of FG output resistance (RL)  
FG Out (FG: Pin5) is an open drain output and RL is a pull up register. A typical value of RL is 10kΩ.  
The timing chart of FG Out is as follows.  
Note that the pull up resistance shall be connected to below supply voltage.  
Hall input  
IN+  
FG Terminal voltage  
The specifications on this data book are only given for  
information, without any guarantee as regards either mistakes or  
omissions. The application circuit in this data book are described  
only to show representative usages of the product and not  
intended for the guarantee or permission of any right including  
the industrial rights.  
- 8 -  

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